试题与答案

A.3562081 B.3502681 C.1381260000 D.138026

题型:单项选择题

题目:


A.3562081

B.3502681

C.1381260000

D.1380260001

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0413/ead8a97df2273aa6049b23fa1e6d26e4.html

下面是错误答案,用来干扰机器的。

参考答案:本题考查的知识点是分布列的性质及数学期望. 解 根据随机变量分布列的规范性可知: 0.2+0.1+a+0.3=1,则a=0.4, 所以 E(X)=-1×0.2+0×0.1+1×0.4+2×0.3=0.8

试题推荐
题型:阅读理解

阅读理解

      When we talk about stars, especially women stars, it seems that they are always young, pretty and own attractive body shapes. But recently a Britain’s Got Talent(英国达人)star Susan Boyle has changed our views completely.

      Simon Cowell, one of the organizers of the talent show spoke of his surprise over Ms Boyle’s voice. “This lady came up, and I’m thinking, ‘This will take five seconds and I can go to have a cup of tea.’ That changed when she began to sing I Dreamed a Dream from Les Miserables. She knew we were going to have that reaction(反应)and just to see that look of satisfaction on her face midway through - it was one of my favorite moments,” Cowell said.

      The performance was posted online and before long, the 47-year-old Scottish woman has been famous all over the world.

      Speaking from her home in Scotland, Ms Boyle said that she hadn’t thought of changing her appearance. She said that her friend helped her with make-up. “I mean, it’s meaningless.” She added.

      Ms. Boyle also spoke of the reason she first began to explore her musical talents. “ I was kind of slow at school, so getting something like singing was a good way of hiding behind that and therefore it built my confidence.’’

1. Susan Boyle had a look of satisfaction on her face when she was singing because ________.          

A. she was confident of her singing

B. she was satisfied with the organizers

C. she was pretty and in good shape

D. she sang the song I Dreamed a Dream from Lea Miserables  

2. According to the passage, which is NOT true?

A. It was the musical talents that built Susan's confidence.

B. Susan Boyle was not good at her lessons when at school.

C. Susan Boyle became famous because of her appearance.

D. Simon Cowell didn't think Susan Boyle a good singer at the time sight.

3. What can we learn from Susan Boyle’s success?

A. It’s never too old to learn.  

B. It’s easier to succeed at the age of 47.

C. If you have a dream, keep trying to make it come true!  

D. If you are not able to study well, to be a singer instead.

查看答案
题型:单项选择题 案例分析题

患者男,78岁。因行髋关节置换术后3d,出现发热伴呼吸困难收入重症监护病房。进入ICU后,因患者呼吸窘迫伴严重低氧血症立即行气管插管,呼吸机辅助呼吸,气道内吸出大量黄脓痰。体格检查:烦躁不安,血压146/66mmHg,脉搏105/min,体温38.7℃。双肺广泛干湿啰音。腹部膨隆,肠鸣音弱。既往有高血压、糖尿病史。血常规:WBC16×10/L,中性粒细胞0.88,血肌酐152μmol/L。经过3d积极抗感染治疗后,患者症状仍进一步加重。在最近的6h内,患者入量1100ml,尿量仅100ml。急查血常规:白细胞22×10/L,中性粒细胞0.92,血红蛋白109g/L。

最需要尽快实施的措施是(提示在随后的24h内,调整了抗生素治疗,放置颈内静脉置管,监测中心静脉压,将中心静脉压维持在12cmHO。静脉推注呋噻米40mg。患者24h入量3100ml,尿量320ml,血压156/84mmHg,双肺仍广泛湿啰音,双下肢及背部低垂部位凹陷性水肿。血清钾6.0mmol/L,钠135mmol,肌酐452μmol/L,尿素氮19mmol/L。)()

A.静脉滴注碳酸氢钠

B.静脉滴注酚妥拉明

C.腹腔透析

D.间隙性血液透析

E.静脉-静脉血液滤过

F.持续性静脉-静脉血液透析滤过

G.血浆吸附

查看答案
微信公众账号搜索答案